These include the well-known AM, FM, shortwave and citizens bands and VHF and UHF television channels, as well as hundreds of less familiar bands that serve cellular and cordless telephones, GPS trackers, air traffic control radars, security alarms, radio
These include the well-known AM, FM, shortwave and citizens bands and VHF and UHF television channels, as well as hundreds of less familiar bands that serve cellular and cordless telephones, GPS trackers, air traffic control radars, security alarms, radio
这些频率包括众所周知的AM、FM、短波、民用频带，VHF和UHF电视频道，以及数百个较不为人知的频带，供行动电话、家用无线电话、GPS追踪系统、航空管制雷达、安全警示与无线电遥控玩具等使用（见85页〈无线电频谱〉）。